Year	% of total teachers
2000	86.5988464355469
2003	83.8993606567383
2004	83.6260070800781
2005	82.3828201293945
2006	82.5346527099609
2007	81.6596527099609
2008	79.8886566162109
2009	79.7224197387695
2010	78.0014266967773
2011	78.6840286254883
2012	78.5058364868164
2013	78.1159210205078
2014	77.1709136962891
2015	77.6967010498047
2016	76.6892013549805
2017	75.9768905639648
2018	75.5920104980469
2019	75.4870300292969
2020	74.4626922607422
2021	75.3269424438477
2022	74.4520263671875